Fan for use in spark-arresting and smoke-consuming devices



w. A, WATTERSON. FAN FOR USE IN SPARK ARRESTING AND SMOKE CONSUMING DEVICES.

I APPLICATION FILED AUG. 5, 1919- 1 35,0, 1 9 1 Patented Aug. 17, 1920.

ANDREW w mnsoa i swam-a SOUTH WALES, AUSTRALIA. 'f I FAN F03 USE IN SPARK-ARRESTING AND SMOKE-CONSUMING JJEv IcEs.

Britain, residing at Macquarie iver, via

Euchareena, in the State of New South l/Vales, .Australia, have invented an Im proved Fan for Use in Spark-Arresting and Smoke-Consuming Devices, 0f which the:

. following is a specification.

This invention relates to devices applied v to smoke stacks of furnaces for drawing back the sparks and, smoke and delivering same beneath the fire bars for destruction purposes and incidentally to improve the dral't and save fuel and labor.

The invention is particularly applicable to spark arresters wherein a steam jet porjected across the smoke stack draws the smoke and sparks into a pipe leading beneath the fire bars of'the furnace, said pipe having a fan rotated by the current passing therethrough. J

According to this invention the suction of smoke is improved by means of a fan of .25 special construction driven mechanically.

A practical illustration of the fan is do} picted in i the accompanying drawings whereof-- Figure l is an-elevation of the fan;

Fig. 2a vertical sectionof'the fancylinder and Fig. 3 a section of one of the 'fan blades.

Fig. 4 is an enlarged cross section of one of the air inlets and its control shutter.

According to these drawings the fan comprises a cylindrical flanged casing 1 and a spindle 2 on which is a'hub 3 carrying radial arms 4: bent at their outer endsto each of which is fixed a fan blade 5 curved as shown in Fig. 3, and. set tangentially as illustrated in Fig. 2,

blades'in position relative'to the periphery of the caslng.

means for rotating same such as a pulley 9 adapted to be rotated by a belt.

The suction pipe 10 through which the smoke, gases and sparks are drawn from Specification of Letters Batent.

said blades being braced together by wires 6 to hold said The spindle'is journaled'l at each end in- V Patented Aug. 17, 1920. Application filed August 5; 1919. Serial No. 315,501. I l

the stack is at theinlet side of the fan connected with a junction piece consisting of two branches 11, 12 the lower ends of which are cast with flared mouths 13 provided with flanges 14 which are bolted to the flanges 15 at the ends of the casing, said gage in guides 13 on the bottom of the. flared mouth 13, the object being to either ease the suction from the stacker to increase the draft in the delivery pipe 18 confiared mouths connecting with the end inlet 3 openings of the fan casing. j to nected to the fancasing and leading to the furnace. V 9

The fancasing adjacent the delivery pipe 18 is formed withjan outwardly bulging enlargement or recess 19-to accelerate the exit of the smoke into said delivery pipe. I

I claim 1. A fan for spark arresting and smoke consuming devices of the'kind specified, consisting of a cylindricalcasing, a mechanica-lly operated :spindle extending there through and upon which are fixed rotary fan blades, a discharge pipe from the casing, a junction pipe connected at one end with the suction pipe and formed at the other end with branches connected with the ends of the casing, the mouths of said branches beingflared and provided. with controllable air inlets.- V

2. A fan for sparkarresting and smoke consuming devices of the kind specified, consisting of a cylindrical casing, a mechanically operated spindle extending therethrough and upon which are fixed rotary fan blades, a'discharge pipe from the casing formed with an outwardly bulging recess, a junction pipe connected at one end with the suction pipe and formed at the other end with branches connected with the ends of -'the casing, the mouths of said branches being flared and provided with controllablefair inlets. I

3. A fan for spark arresting'and smoke consuming devices of the kind specified, consisting of a cylindrical casing, a mechanically operated spindle extending theretion pipe and formed at the other end with through provided with a boss having radial branches connected with the ends of the bent arms carrying curved fan blades set casing, the mouths of said branches :being 10 tangentially and braced together by Wires, flared; and prpvided withcentrollable air '5 a discharge pipe from the casing fgrmed inlets. i v I with an outwardly. bulging recess, a junc; V Dated this eleventh daypfJune, 1919. tio'n ipeconnectedat one endwi'th'the'suc: u WILLIAM ANDREW WATTERSON. 

